Clarification on Multiple L2PTP Tunnels over a Single Physical Link

[Fatih Berkay Sarpkaya]

Dear FABRIC Team,

I have a question regarding Layer 2 Point-to-Point (L2PTP) links with guaranteed bandwidth between sites.

Is it possible to reserve multiple L2PTP tunnels over the same physical link? For example, if a node has a SmartNIC with two physical ports, can one of those ports be used to create multiple (e.g., four) distinct tunnels to different destination addresses? Or is each SmartNIC port limited to a single L2PTP tunnel?

Any clarification or guidance on this would be greatly appreciated.

Best regards,

Fatih Berkay Sarpkaya

[Komal Thareja]

Hi Fatih,

You should be able to create multiple tunnels on the same NIC by using VLAN-tagged sub-interfaces. Each sub-interface can be assigned to a different L2PTP tunnel, allowing multiple distinct connections over the same physical port.

Please check out the example notebook fabric_examples/fablib_api/sub_interfaces/sub_interfaces.ipynb for details on how to configure sub-interfaces.

Best regards,
Komal

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